Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
         Order Squaliformes Compagno, 1973 - dogfish sharks
           1 Family Dalatiidae Gray, 1851 - kitefin sharks
           2 Family Centrophoridae Bleeker, 1859 - gulper sharks
           3 Family Squalidae Blainville, 1816 - dogfish sharks
           4 Family Echinorhinidae Gill, 1862 - bramble sharks